Q.31)-A real gas can act as ideal gas at
- Low pressure and high temperature
- High pressure and low temperature
- Low temperature and high pressure
- High temperature and low pressure
Q.32)-A white and smooth surface is
- Good absorber and good reflector of heat
- Bad absorber and good reflector of heat
- Good absorber and bad reflector of heat
- Bad absorber and bad reflector of heat
Q.33)-A cycle tyre bursts suddenly.this represents an
- Isothemal process
- Adiabatic process
- Isochoric process
- Isobaric process
Q.34)-The wavelength at which the peak of intensity of black body radiation occurs
- Increases with increase in temperature
- Decreases with increase in temperature
- Is the same at all temperature
- Does not follow any pattern as temperature changes
Q.35)-A blackbody can absorb radiations of
- Lower wavelengths only
- Intermediate wavelength only
- Higher wavelengths only
- All wavelengths
Q.36)-In a refrigerator a cooling system should always be
- At the top
- At the botton
- At the middle
- Can be anywhere
Q.37)-In a refrigerator what produces cooling?
- The ice which deposits on the freezer
- The sudden expansion of a compressed gas
- The evaporation of a compressed gas
- None of these
Q.38)-Outside of cooking utensils are generally left black from below because
- It is difficult to clean daily
- Black surface is a good conductor of heat
- Black surface is a poor conductor of heat
- Black surface is a good absorber of heat
Q.39)-What is not true about temperature?
- It is one of the seven SI base quantities
- It is measured in degree celsius in SI unit
- Temp 00C=273.15K.
- All are true
Q.40)-Density of water is IG/CC. it is strictly valid at
- 0 0C
- 4 0C
- 25 0C
- 100 0C